Guard for dental tools.



No. 763,918. I PATENTED JUNE 28,1904. R. L. MAGOON. GUARD FOR DENTALTOOLS.

no MODEL.

UNITED STATES Patented June 28, 1904.

ROY L. MAGOON, OF GRACEVILLE, MINNESOTA.

GUARD FOR DENTAL TOOLS- SPECIFIGATION forming part of Letters Patent No.763,918, dated June 28, 1904.

Application filed November 2, 1903. Serial No. 179,516, \No model.)

To all whom it may concern.-

Be it known that I, RoY L. MAGOON, a citizen of the United States,residing at Graceville, in the county of Bigstone and State ofMinnesota, have invented certain new and useful Improvements in Guardsfor DentalTools;

and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains tomake and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to new and useful improvements in attachments tothe handpieces of dental engines; and the object of the invention is toproduce a guard or shield positioned about a grindstone or otherinstruments, whereby when an operator is at work upon the teeth of apatient the tongue or checks adjacent to the work may be protected fromcontact with the tool.

More specifically, the invention comprises a hood or guard having ahollow shank portion adapted for attachment to the handpiece of a dentalengine and one side of the hood or shield being flaring and having anelongated opening somewhat contracted along its opposite edge, so thatthe tool carried between the walls of the shield may be applied to thework and at the same time hold the parts back from contact with thetooth, by whichconstruction the operator may have access to the parts being operated upon and at the same time is able to see his work.

My invention is illustrated in the accompanying drawings, which, withthe letters of reference marked thereon, form a part of thisapplication, and in which drawings Figure 1 is a perspective view of theprotecting-shield. Fig. 2 is a bottom plan view. Fig. 3 is an edge view.Fig. 4 is an end view of the shield, and Fig. 5 is a View showing thedevice attached to aliandpiece of a dental engine with thegrinding-wheel mounted on the stem of the tool.

Reference being had to the details of the drawings by letter, Adesignates a protectingshield which is made, preferably, of the shapeillustrated and of any suitable material. Said hood has flaring sideswith a wide opening B,

the opposite longitudinal sides of which taper in opposite directionsand merge into a hollow shank portion D, which has a slot E cut in fromone end, and an offset E from the end of said slot for engagement with alug or other fastening means upon the handpiece of the engine. carriedby the handpiece projects through an aperture in the end of said shieldand is positioned intermediate the walls of the hood. The portion ofsaid shield opposite the wide opening portion has an elongated slot F,one end of which terminates adjacent to the end of the shank portion,while its other end eX- tends into the flattened end of the shield, as

shown clearly in the end view of the drawings.

The marginal edges of the flaring portion of the hood are conveXed, asshown at K, and

merge into the shank portion adjacent to the aperture through which thestem of the tool passes.

By the peculiar shape of the shield shown I have found from experiencethat the tongue, the gums, and the checks of a patient may be held awayfrom bridgeworkupon the teeth while being operated upon by such tools asgrindstones, saws for separating the teeth, &c., and at the same timethe operator is afforded means of seeing the work which is beingaccomplished by the tool having the shield.

While I have shown a particular shape of shield embodying the featuresof my invention, it will be understood that I may make alterations inthe detailed construction of the same, if desired, without in any waydepart ing from the spirit of the invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. An attachment to the handpiece of dental engines comprising a shieldhaving a shank portion through which the stem of a tool is adaptedtopass, said shield being flaring and having an elongated slot oppositeits flaring opening, and adapted to surround the tool held therein, asset forth.

2. An attachment for the handpiece of a The shank portion of the tooldental engine comprising a shield having a shank portion adapted to besecured to said handpiece, an aperture to receive the shank portion of atool, said shield having flaring sides terminating in an end at rightangles to the shank portion of the shield, and a portion of the shieldopposite its flaring opening having an elongated slot, the edges of theshield forming said slot being parallel and terminating in a eoncavedmarginal recess in the end of the shield, as set forth.

3. Adeviee for attachment to the handpiece of a dental engine comprisinga shield having a hollow shank portion adapted for attachment to saidhandpiece, said shield having a flaring opening, an aperture to receivethe stem of a tool, the edges of the flaring portion of the shield beingconvexed, and an elongated slot in the contracted portion of the shieldopposite the flaring opening, the marginal edges of said flaring openingbeing eonvexed and merging into a coneaved recess in the end of theshield, as set forth.

In testimony whereof I hereunto afiix my signature in presence of twoWitnesses.

ROY L. MAGOON.

l/Vitnesses:

M. J. MCDONNELL, MAGGIE MoDoNNnLL.

